2 # Bug#38231 Innodb crash in lock_reset_all_on_table() on TRUNCATE + LOCK / UNLOCK
3 # http://bugs.mysql.com/38231
6 -- source include/have_innodb_plugin.inc
8 SET storage_engine=InnoDB;
10 # we care only that the following SQL commands do not crash the server
14 DROP TABLE IF EXISTS bug38231;
15 CREATE TABLE bug38231 (a INT);
17 -- connect (con1,localhost,root,,)
18 -- connect (con2,localhost,root,,)
19 -- connect (con3,localhost,root,,)
23 LOCK TABLE bug38231 WRITE;
28 LOCK TABLE bug38231 WRITE;
30 # When con1 does UNLOCK below this will release either con2 or con3 which are
31 # both waiting on LOCK. At the end we must first --reap and UNLOCK the
32 # connection that has been released, otherwise it will wait forever. We assume
33 # that the released connection will be the first one that has gained the LOCK,
34 # thus we force the order here - con2 does LOCK first, then con3. In other
35 # words we wait for LOCK from con2 above to be exected before doing LOCK in
39 SELECT COUNT(*) = 1 FROM information_schema.processlist
40 WHERE info = 'LOCK TABLE bug38231 WRITE';
41 -- source include/wait_condition.inc
42 # the above enables query log, re-disable it
48 LOCK TABLE bug38231 WRITE;
52 TRUNCATE TABLE bug38231;
55 # Wait for TRUNCATE and the other two LOCKs to be executed; without this,
56 # sometimes UNLOCK executes before them. We assume there are no other
57 # sessions executing at the same time with the same SQL commands.
59 SELECT COUNT(*) = 1 FROM information_schema.processlist
60 WHERE info = 'TRUNCATE TABLE bug38231';
61 -- source include/wait_condition.inc
63 SELECT COUNT(*) = 2 FROM information_schema.processlist
64 WHERE info = 'LOCK TABLE bug38231 WRITE';
65 -- source include/wait_condition.inc
66 # the above enables query log, re-disable it
69 # this crashes the server if the bug is present
89 # test that TRUNCATE works with with row-level locks
94 INSERT INTO bug38231 VALUES (1), (10), (300);
96 -- connect (con4,localhost,root,,)
100 SELECT * FROM bug38231 FOR UPDATE;
102 -- connection default
103 TRUNCATE TABLE bug38231;
108 -- connection default